var wall_rotation = {}
wall_rotation[FRONT] = PI
wall_rotation[BACK] = 0
wall_rotation[LEFT] = HALF_PI
wall_rotation[RIGHT] = -HALF_PI

var scenery = new function(){
	
	var base = this;

	base.mouse = new mouse ()
	
	base.init = function(){
		var urls = [
			"http://www.donedwardsart.com/upload/2008-4-18_resting%20wood%20duck.jpg",
			"http://cdn.dailypainters.com/paintings/_four_quackers__baby_duck_oil_painting_by_texas_ar_3d3162fd43295d059068ae1c204367e3.jpg",
			"http://2.bp.blogspot.com/-apEunnES6wU/UGdc6skZqzI/AAAAAAAAB3k/D6yO6llpFcg/s1600/Sunny+Side+Duck.JPG",
			"http://imagecache.artistrising.com/artwork/lrg//5/559/5UD2000A.jpg",
			"http://media-cache-ec0.pinimg.com/736x/fc/a7/31/fca731130ffb964a434fb90edecd22c3.jpg",
		]
		var loader = new Loader(function(){
			base.load(loader.images)
		})
		loader.preloadImages(urls)
	}
	
	base.load = function(images){
		images.forEach(function(img){
			img.width = 300
			img.height = ~~(300 * img.naturalHeight/img.naturalWidth)
		})
		
		clipper.rooms.forEach(function(room){
			room.walls.forEach(function(wall){
				new_image(wall, choice(images))
			})
		})
	}
	
	function new_image (wall, img) {
		var x, z
		
		if (! wall.fits(img)) return

		var mx_img = new MX.Image({
			src: img.src,
			x: 0,
			y: clipper.rooms[wall.room].height/2 - img.height/2 - 20,
			z: 0,
			scale: 300/img.naturalWidth,
			rotationY: 0,
			backface: false,
		})

		var center = wall.center_for(img)
		mx_img.move({
			x: center.a,
			z: center.b,
			rotationY: wall_rotation[ wall.side ]
		})
		scene.add(mx_img)

		// https://s3.amazonaws.com/luckyplop/f5b2c20e602cdfc86383910f294dcf23d91fa956.png
		
		var x = 0, y = 0, z = 0, bounds

		// should be proportional to distance from wall
		var cursor_amp = 1.5
		var dragging = false
		
		base.mouse.bind_el(mx_img.el)
		base.mouse.tube.on("down", function(e, cursor){
			if (e.target != mx_img.el) return;
			dragging = true
			x = mx_img.x
			y = mx_img.y
			z = mx_img.z
			mx_img.el.style.pointerEvents = "none"
			bounds = wall.bounds_for(img)
		})
		base.mouse.tube.on("enter", function(e, new_wall, cursor){
			if (! dragging) return
			if (new_wall.uid == wall.uid) return
			if (! new_wall.fits(img)) return
			bounds = new_wall.bounds_for(img)
			center = new_wall.center_for(img, cursor.x.magnitude())

			mx_img.move({
				x: center.a,
				z: center.b,
				rotationY: wall_rotation[ new_wall.side ]
			})

			cursor.x.invert()
						
			wall = new_wall
		})
		base.mouse.tube.on("drag", function(e, cursor){
			if (! dragging) return
			mx_img.y = bounds.y.clamp( y - cursor.y.magnitude()*cursor_amp )
			switch (wall.side) {
				case FRONT:
					mx_img.x = bounds.x.clamp( x + cursor.x.magnitude()*cursor_amp )
					break
				case BACK:
					mx_img.x = bounds.x.clamp( x - cursor.x.magnitude()*cursor_amp )
					break
				case LEFT:
					mx_img.z = bounds.x.clamp( z - cursor.x.magnitude()*cursor_amp )
					break
				case RIGHT:
					mx_img.z = bounds.x.clamp( z + cursor.x.magnitude()*cursor_amp )
					break
			}
		})
		base.mouse.tube.on("up", function(e, cursor){
			dragging = false
			mx_img.el.style.pointerEvents = "auto"
		})
	}
		
	return base

}